hi all.i have preordered a canon 500d in preference to purshasing a 450d imediatly (at a hard to go past pricetag) because from what i can gather by the 500's specs, the coupleahundred $ price difference between the two models,and the wait are minor inconviences for what seems to be a fine camera for the money.is this in your learned opinions a reasonable assumption,or should i be taking advantage of the sale price of the 450?